Logo
D Errors
Codes / Error Code 020

Error Code 020

Overview

This error occurs when a variable, function, or other symbol is defined multiple times in the same scope, causing a conflict. The compiler cannot determine which definition to use, leading to an error.

Details

  • Common Causes:

    • Declaring variables with the same name in the same scope.
    • Duplicating function definitions or class members.
    • Importing modules that define conflicting symbols.

  • Example:

void main() {
    int value = 10;
    int value = 20; // Error: symbol `value` redefined
}
  • Solution:
    • Use unique names for variables and functions in the same scope: 
      void main() {
    int value1 = 10;
    int value2 = 20;
    writeln(value1, value2); // No conflict
}
    • Check imported modules for conflicting definitions and use selective imports or aliases: 
      import module1 : func1;
import module2 : func1 as func2;

void main() {
    func1();
    func2();
}
    • Avoid redefining symbols by ensuring each is uniquely declared.